> For the complete documentation index, see [llms.txt](https://docs.coda.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.coda.co/codapay/direct-api-integration/direct-api-integration-for-cards/whitelist-ip-address.md).

# Whitelist IP Address

{% hint style="success" %}
Only if the transaction callback can get through your firewall and send you a transaction completion notification message.
{% endhint %}

To ensure that payment callback notifications are successfully received and not rejected by your servers, please take note of the following:

1. If your firewall or server configuration requires IP whitelisting for Codapay egress IPs, please send an email request to our support team at <codapay_integration@coda.co>
2. Upon your request, we will provide you with the updated IP ranges or alternative domain/endpoint validation details required for your whitelist configuration.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.coda.co/codapay/direct-api-integration/direct-api-integration-for-cards/whitelist-ip-address.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.